| 单词 | platinum black |
| 释义 | platinum black (once / 622069 pages) n WORD FAMILY platinum black USAGE EXAMPLESA limpid, colorless, inflammable liquid from the slow oxidation of alcohol under the influence of platinum black. Webster, Noah, Webster's Unabridged Dictionary(2012) Acetylene combines with hydrogen in the presence of platinum black, and ethylene and then ethane result. Leeds, F. H. (Frank Henley), Acetylene, the Principles of Its Ge...(2010) n a fine black powder of platinum; used as a catalyst in chemical reactions Hyper accelerator, catalyst (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected |
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